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This topic has been translated from a Chinese forum by GPT and might contain errors.Original topic: DM Relay 同步 开启Gtid时报错handle a potential duplicate event，关闭Gtid开启relay正常
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username: TiDBer_FIhl7zln
【TiDB Usage Environment】Production Environment
【TiDB Version】V7.5.0
【Reproduction Path】Data source enabled Gtid, enabled relay, relay synchronization error handle a potential duplicate event
【Encountered Problem: Problem Phenomenon and Impact】handle a potential duplicate event error code 30029
【Resource Configuration】Go to TiDB Dashboard - Cluster Info - Hosts and take a screenshot of this page
【Attachment: Screenshot/Log/Monitoring】
I tried to disable gtid and then enable relay synchronization, which worked fine, but the cloud service I use has master-slave switchovers.
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